1 files changed, 147 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/queryconversions.cpp b/src/3rdparty/angle/src/libANGLE/queryconversions.cpp
new file mode 100644
index 0000000000..460e346eac
--- /dev/null
+++ b/src/3rdparty/angle/src/libANGLE/queryconversions.cpp
@@ -0,0 +1,147 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// queryconversions.cpp: Implementation of state query cast conversions
+
+#include "libANGLE/Context.h"
+#include "common/utilities.h"
+
+namespace gl
+{
+
+// Helper class for converting a GL type to a GLenum:
+// We can't use CastStateValueEnum generally, because of GLboolean + GLubyte overlap.
+// We restrict our use to CastStateValue, where it eliminates duplicate parameters.
+
+template <typename GLType>
+struct CastStateValueEnum { static GLenum mEnumForType; };
+
+template <> GLenum CastStateValueEnum<GLint>::mEnumForType      = GL_INT;
+template <> GLenum CastStateValueEnum<GLuint>::mEnumForType     = GL_UNSIGNED_INT;
+template <> GLenum CastStateValueEnum<GLboolean>::mEnumForType  = GL_BOOL;
+template <> GLenum CastStateValueEnum<GLint64>::mEnumForType    = GL_INT_64_ANGLEX;
+template <> GLenum CastStateValueEnum<GLfloat>::mEnumForType    = GL_FLOAT;
+
+template <typename QueryT, typename NativeT>
+QueryT CastStateValueToInt(GLenum pname, NativeT value)
+{
+    GLenum queryType = CastStateValueEnum<QueryT>::mEnumForType;
+    GLenum nativeType = CastStateValueEnum<NativeT>::mEnumForType;
+
+    if (nativeType == GL_FLOAT)
+    {
+        // RGBA color values and DepthRangeF values are converted to integer using Equation 2.4 from Table 4.5
+        if (pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
+        {
+            return static_cast<QueryT>((static_cast<GLfloat>(0xFFFFFFFF) * value - 1.0f) / 2.0f);
+        }
+        else
+        {
+            return gl::iround<QueryT>(value);
+        }
+    }
+
+    // Clamp 64-bit int values when casting to int
+    if (nativeType == GL_INT_64_ANGLEX && queryType == GL_INT)
+    {
+        GLint64 minIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::min());
+        GLint64 maxIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::max());
+        GLint64 clampedValue = std::max(std::min(static_cast<GLint64>(value), maxIntValue), minIntValue);
+        return static_cast<QueryT>(clampedValue);
+    }
+
+    return static_cast<QueryT>(value);
+}
+
+template <typename QueryT, typename NativeT>
+QueryT CastStateValue(GLenum pname, NativeT value)
+{
+    GLenum queryType = CastStateValueEnum<QueryT>::mEnumForType;
+
+    switch (queryType)
+    {
+      case GL_INT:              return CastStateValueToInt<QueryT, NativeT>(pname, value);
+      case GL_INT_64_ANGLEX:    return CastStateValueToInt<QueryT, NativeT>(pname, value);
+      case GL_FLOAT:            return static_cast<QueryT>(value);
+      case GL_BOOL:             return (value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
+      default: UNREACHABLE();   return 0;
+    }
+}
+
+template <typename QueryT>
+void CastStateValues(Context *context, GLenum nativeType, GLenum pname,
+                     unsigned int numParams, QueryT *outParams)
+{
+    if (nativeType == GL_INT)
+    {
+        GLint *intParams = NULL;
+        intParams = new GLint[numParams];
+
+        context->getIntegerv(pname, intParams);
+
+        for (unsigned int i = 0; i < numParams; ++i)
+        {
+            outParams[i] = CastStateValue<QueryT>(pname, intParams[i]);
+        }
+
+        delete [] intParams;
+    }
+    else if (nativeType == GL_BOOL)
+    {
+        GLboolean *boolParams = NULL;
+        boolParams = new GLboolean[numParams];
+
+        context->getBooleanv(pname, boolParams);
+
+        for (unsigned int i = 0; i < numParams; ++i)
+        {
+            outParams[i] = (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
+        }
+
+        delete [] boolParams;
+    }
+    else if (nativeType == GL_FLOAT)
+    {
+        GLfloat *floatParams = NULL;
+        floatParams = new GLfloat[numParams];
+
+        context->getFloatv(pname, floatParams);
+
+        for (unsigned int i = 0; i < numParams; ++i)
+        {
+            outParams[i] = CastStateValue<QueryT>(pname, floatParams[i]);
+        }
+
+        delete [] floatParams;
+    }
+    else if (nativeType == GL_INT_64_ANGLEX)
+    {
+        GLint64 *int64Params = NULL;
+        int64Params = new GLint64[numParams];
+
+        context->getInteger64v(pname, int64Params);
+
+        for (unsigned int i = 0; i < numParams; ++i)
+        {
+            outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]);
+        }
+
+        delete [] int64Params;
+    }
+    else UNREACHABLE();
+}
+
+// Explicit template instantiation (how we export template functions in different files)
+// The calls below will make CastStateValues successfully link with the GL state query types
+// The GL state query API types are: bool, int, uint, float, int64
+
+template void CastStateValues<GLboolean>(Context *, GLenum, GLenum, unsigned int, GLboolean *);
+template void CastStateValues<GLint>(Context *, GLenum, GLenum, unsigned int, GLint *);
+template void CastStateValues<GLuint>(Context *, GLenum, GLenum, unsigned int, GLuint *);
+template void CastStateValues<GLfloat>(Context *, GLenum, GLenum, unsigned int, GLfloat *);
+template void CastStateValues<GLint64>(Context *, GLenum, GLenum, unsigned int, GLint64 *);
+
+}